APD is an initialism that may refer to:

Medicine

Afferent pupillary defect A relative afferent pupillary defect (RAPD), also known as a Marcus Gunn pupil (after Robert Marcus Gunn), is a medical sign observed during the swinging-flashlight test whereupon the patient's pupils excessively dilate when a bright light is s ...

* Acid Peptic Diseases * Ambulatory Peritoneal Dialysis *

Pamidronic acid Pamidronic acid or pamidronate disodium or APD (marketed as Aredia among others), is a nitrogen-containing bisphosphonate used to prevent osteoporosis. It was patented in 1971 and approved for medical use in 1987. Medical uses It is used to pr ...

, also known as aminohydroxypropylidene bisphosphonate *

Antipsychotic Drugs Antipsychotics, previously known as neuroleptics and major tranquilizers, are a class of psychotropic medication primarily used to manage psychosis (including delusions, hallucinations, paranoia or disordered thought), principally in schizoph ...

Auditory processing disorder Auditory processing disorder (APD) is a neurodevelopmental disorder affecting the way the brain processes sounds. Individuals with APD usually have normal structure and function of the ear, but cannot process the information they hear in the s ...

, difficulty in recognising sounds *

Antisocial personality disorder Antisocial personality disorder (ASPD) is a personality disorder defined by a chronic pattern of behavior that disregards the rights and well-being of others. People with ASPD often exhibit behavior that conflicts with social norms, leading to ...

Avoidant personality disorder Avoidant personality disorder (AvPD), or anxious personality disorder, is a cluster C personality disorder characterized by excessive social anxiety and inhibition, fear of intimacy (despite an intense desire for it), severe feelings of inade ...

* Antimicrobial Peptide Database * Autoimmune progesterone dermatitis

Law enforcement

* Airport Police Division, Singapore *

Akron Police Department Akron Police Department is the primary municipal law enforcement agency for the city of Akron, Ohio, Akron, Ohio, United States with 451 employees. The current Police Chief is Brian Harding. History Early years The city of Akron was founded in D ...

* Albany Police Department (Oregon) *

Albuquerque Police Department The Albuquerque Police Department (APD) is the municipal law enforcement agency of Albuquerque, New Mexico. It is the largest police force in the state, with approximately 1,000 sworn officers in 2022. In addition to serving as the primary pol ...

Amtrak Police Department The Amtrak Police Department (APD) is a federal railroad police department of Amtrak (also known as the National Railroad Passenger Corporation), the government-owned passenger train system in the United States. It is headquartered at Union St ...

Anaheim Police Department Anaheim ( ) is a city in northern Orange County, California, United States, part of the Greater Los Angeles area. As of the 2020 census, the city had a population of 346,824, making it the most populous city in Orange County, the tenth-most ...

Anchorage Police Department The Anchorage Police Department (APD) is the Police, police department serving the Anchorage, Alaska, Municipality of Anchorage in Alaska. APD is responsible for police services for the entirety of the Municipality of Anchorage, including the c ...

Annapolis Police Department The Annapolis Police Department (APD) is a full-service law enforcement agency servicing a population of over 38,000 residents in of the municipality of Annapolis, Maryland.Antioch Police Department The Antioch Police Department is a police department serving the East Bay city of Antioch, California in the San Francisco Bay Area. Organization The department is organized into two divisions that administer a number of bureaus. * Field Ser ...

* Apopka Police Department *

Arcadia Police Department The Arcadia Police Department is the police department serving Arcadia, California. The headquarters of the Arcadia Police Department is located at 250 West Huntington Drive, adjacent to Arcadia City Hall. It is across the street from the Santa ...

Asheville Police Department Asheville ( ) is a city in Buncombe County, North Carolina, United States. Located at the confluence of the French Broad River, French Broad and Swannanoa River, Swannanoa rivers, it is the county seat of Buncombe County. It is the most populou ...

Atlanta Police Department The Atlanta Police Department (APD) is a law enforcement agency in the city of Atlanta, Georgia (U.S. state), Georgia, United States. The city shifted from its rural-based Marshal and Deputy Marshal model at the end of the 19th century. In 1873, ...

Aurora Police Department The Aurora Police Department (APD) is a law enforcement agency serving the City of Aurora, Colorado, United States and some surrounding areas. Its headquarters are at 15001 East Alameda Parkway. APD is one of the largest municipal police departme ...

, Colorado *

Austin Police Department Austin Police Department (APD) is the principal law enforcement agency serving Austin, Texas. As of fiscal year 2022, the agency had an annual budget of $443.1 million and employed around 2,484 personnel, including approximately 1,809 officers. ...

Other

Air Passenger Duty Air Passenger Duty (APD) is an excise duty which is charged on the carriage of passengers flying from a United Kingdom or Isle of Man airport on an aircraft that has an authorised take-off weight of more than 5.7 tonnes or more than twenty seat ...

, an excise duty levied on passengers flying from UK airports * APD, NYSE stock symbol for

Air Products & Chemicals Air Products and Chemicals, Inc. is a U.S.-based international corporation whose principal business is selling gases and chemicals for industrial use. Air Products is headquartered in Trexlertown, Pennsylvania, in the Lehigh Valley region of east ...

* APD, reporting mark for the

Albany Port Railroad The Albany Port Railroad operates industrial trackage at the Port of Albany-Rensselaer located to the south of downtown Albany, NY along the Hudson River. Customers include a large Cargill grain facility. The operation is jointly owned by CSX and ...

* ''

Alianza por la Democracia The Alliance for Democracy ( or ''APD'') is a political party in the Dominican Republic. It first contested national elections in 2002, Nohlen, D (2005) ''Elections in the Americas: A data handbook, Volume I'', p251 when it was part of the defe ...

'', a Dominican Republic political party *

Alpha Phi Delta Alpha Phi Delta (), commonly referred to as APD, is an American collegiate fraternity. Alpha Phi Delta was established at Syracuse University in 1914 as an Italian-heritage fraternity. History In 1913, Syracuse University student Nicholas Frunzi ...

, an American college fraternity * APD, National Rail code for

Appledore (Kent) railway station Appledore railway station is a Grade II listed station east of Appledore in Kent, England. It is on the Marshlink line, and train services are provided by Southern. The station was constructed in 1851 by the South Eastern Railway and desig ...

APD-40 APD-40 or APD 40 is a road composed of the U.S. Route 64 Bypass (US 64 Byp.) and a section of Tennessee State Route 60, State Route 60 (SR 60) which forms a partial beltway around the business district of Cleveland, Tennessee. The ro ...

, a stretch of highway near Cleveland, Tennessee * A designation for highways that are part of the

Appalachian Development Highway System The Appalachian Development Highway System (ADHS) is a series of highway corridors in the Appalachia region of the eastern United States. The routes are designed as local and regional routes for improving economic development in the historica ...

(ADHS). * ''

Association de la paix par le droit The Peace Through Law Association () was a French pacifist organization active in the years before World War I (1914–1918) that continued to promote its cause throughout the inter-war period leading up to World War II (1939–1945). For many year ...

'', a French pacifist organisation *

Avalanche photodiode An avalanche photodiode (APD) is a highly sensitive type of photodiode, which in general are semiconductor diodes that convert light into electricity via the photovoltaic effect. APDs use materials and a structure optimised for operating with high ...

, a device for counting photons * Apple Accessory Products Division, former name for The Keyboard Company, Inc. * A retired US Navy hull classification symbol: High-speed transport (APD) *

American political development American political development (often abbreviated as APD) is a subfield of political science that studies the historical development of politics in the United States. In American political science departments, it is considered a subfield within Am ...

{{disambiguation